<?php
/**
 * Zend Framework
 * LICENSE
 * This source file is subject to the new BSD license that is bundled
 * with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://framework.zend.com/license/new-bsd
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@zend.com so we can send you a copy immediately.
 * @category Zend
 * @package Zend_Validate
 * @copyright Copyright (c) 2005-2012 Zend Technologies USA Inc. (http://www.zend.com)
 * @license http://framework.zend.com/license/new-bsd New BSD License
 * @version $Id: Hex.php 24593 2012-01-05 20:35:02Z matthew $
 */
/**
 *
 * @see Zend_Validate_Abstract
 */
require_once 'Zend/Validate/Abstract.php';

/**
 *
 * @category Zend
 * @package Zend_Validate
 * @copyright Copyright (c) 2005-2012 Zend Technologies USA Inc. (http://www.zend.com)
 * @license http://framework.zend.com/license/new-bsd New BSD License
 */
class Zend_Validate_Hex extends Zend_Validate_Abstract {

    const INVALID = 'hexInvalid';

    const NOT_HEX = 'notHex';

    /**
     * Validation failure message template definitions
     * @var array
     */
    protected $_messageTemplates = array(self::INVALID => "Invalid type given. String expected", self::NOT_HEX => "'%value%' has not only hexadecimal digit characters");

    /**
     * Defined by Zend_Validate_Interface
     * Returns true if and only if $value contains only hexadecimal digit characters
     * @param string $value
     * @return boolean
     */
    public function isValid ($value) {
        if ( ! is_string ($value) &&  ! is_int ($value)) {
            $this -> _error (self::INVALID);
            return false;
        }
        $this -> _setValue ($value);
        if ( ! ctype_xdigit ((string) $value)) {
            $this -> _error (self::NOT_HEX);
            return false;
        }
        return true;
    }

}
